cdma_embed.m cdma_recover.m cor_embed.m cor_embed_mod.m cor_recover.m cor_recover_mod.m dct1_embed.m dct1_recover.m dct2_embed.m dct2_embed_mod.m dct2_recover.m dct2_recover_mod.m dwt_embed.m dwt_recover.m lsb_embed.m lsb_recover.m pn_period.m pn_test.m psnr.m